Current Dashboard situation

Currently only Combobox has the option to disable no selection - enforcing that if values are available for the Combobox at least one of them would be selected at all times.

This is super useful for filtering other elements such as diagrams, because you can just dump a lot of data into the other element and the always applied filter ensures that no mixture of different data would ever be shown in the other element.

Improvement idea

Please investigate which other Dashboard elements could make use of a "disable no selection" option. The filter "List" as well as the circle diagram immediately come to mind, but there are probably more elements where this option could be useful.

Please note that enforcing a selection should work independently from whether or not the dashboard creator allows "Multi-Select" for things like the filter "List" or circle diagram. An enforced selection should only select the first (single) value from all the available values - whether that's paired with the user being able to select multiple values or not is up to the dashboard creator.